Re: Anyone willing to admit they own a Jennings?
To answer the question, the trigger subassembly is springloaded to keep the trigger bar tensioned upward. It rides along the frame and pushes the cam which in turn pulls the sear downward. The whole shebang is kept aligned by the grip panel.
The autonomic nervous system provides for involuntary muscle function - the work of breathing, digestion, and so forth. On some folks, that's a pure waste of ingenuity.